Charity event confuses porter
I believe the answer is:
jumble sale
'charity event' is the definition.
'jumble sale' can be an answer for 'event' (I have seen 'parish event' mean 'jumble sale' so perhaps 'event' could also mean 'jumble sale'). I am unsure of the 'charity' bit.
'confuses porter' is the wordplay.
'confuses' becomes 'jumbles' ('jumble' can be a synonym of 'confuse').
'porter' becomes 'ale' (I've seen this in other clues).
'jumbles'+'ale'='JUMBLE-SALE'
Can you help me to learn more?
(Other definitions for jumble sale that I've seen before include "parish event" , "Fund-raising event less common in affluent society" , "Money-raising event disposing of miscellany" , "Event at which discarded items are sold on" , "low prices here?" .)